[WP-34S] Chi-Square Distribution

[Dieter]

(01-13-2014 01:08 AM)Paul Dale Wrote:  Think I found the problem. The normal quantile estimate wasn't dealing with small input probabilities properly. I don't know if this fix breaks anything else

The Normal estimate is crucial not only for the Normal quantile. A problem with small probabilities would cause inaccurate results with the Normal quantile as well - which I have not noticed yet.

The Normal estimate distinguishes between two cases: 0,5 >= p > 0,23 and p < 0,23. So an error with small probabilities would affect every p < 0,23. That's why I wonder what exactly the problem was. Could you post the Normal estimate code before and after your last correction?

Dieter